Description:
I view my LO work on both Linux and MacOS and in Linux everything is "normal". 
When I work on my documents on an older Macbook Air with a non retina display, fonts are generally too large again. This got fixed for a while, but seems to have resurfaced in 7. 

Of course I can scale the view in the lower right hand size, but the scale is saved with the document, so I have to reset it each time I switch computers. I would like to request a fix, either of the following would be helpful:

- Do not save the scale setting in the document metadata
- Restore the scale or DPI option in the Preferences -> Libreoffice -> View settings

Since I see a lot of work was done recently with the new HiDPI feature I have a suspicion this is a side effect/ 

A screen shot is here, you can see that the font is rather big for 9 pt Liberation Sans:
 
https://docs.google.com/document/d/1XAmsnoKSF7otJOloKce3AeT9RXGmRx3zHqIxI0IrTzI/edit?usp=sharing



Steps to Reproduce:
1. Create a spreadsheet on a Linux laptop
2. View it on a non-Retina Mac laptop
3.

Actual Results:
Fonts need to be scaled.

Expected Results:
Scaling the doc each time the doc is viewed on another display should not be necessary,


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Rescaling the doc each time the doc is viewed on a different computer should not be necessary.

I have:
Macbook Air 11 inch mid 2011, macOS High Sierra 10.13.6 (last version available for this Air)
Screen is 135 DPI (non-Retina)
Version: 7.1.4.2 / LibreOffice Community
Build ID: a529a4fab45b75fefc5b6226684193eb000654f6
CPU threads: 4; OS: Mac OS X 10.13.6; UI render: GL; VCL: osx
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded